Improvement in machines for grinding needles



3 Sheecs-Sheet l.

11W. MALLET?, MACHINE FOR GRINDING NEEDLES.

' Patente Jan 25 187B @if/Ja.

N. PETE-HS, PHOTO 'Smets-Sheet@ I12W'. MALLETT.

. MAcHINE FOR GRINDING NEEDLES; 10.172,639. Patented Jan. ze, 187e.

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3 Sheets-Sheet 3. F. W. MALLETT.

MACHINE FOR GRINDING NEEDLES. No.172f,639. Patented Jan. 25,1876.

N. PETERS, PHOTOL\THOGRAPHER. WASHINGTON. D C.

UNITED STATES FRANCIS W. MALLETT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO COOK PATENT CEFICE.

AND PORTER NEEDLECOMPANY, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FOR GRlNDING NEEDLES.

Specification forming part of Letters Patent No. 172,639., dated January Q5, 1876 application led July 13, 1875.

To all whom it may concern: p Be it known that LFRANGIS W. MALLETT, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Needle-Machines; and I do hereby declare the following, When taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the saine, and which said drawings constitute part of this specication, and represent, in-

Figure l, plan or top view;v Figs. 2, 3, 4, 5, 6, 7, detached views.

` This invention relates to the construction of a machine for the m annfacture of that class of sewing-machine needles in which the body of the needle is reduced from the shank, the

object ot' the invention `being to present theV needle-blanks are laid.' Upon this bed plates D D are arranged, and so as to be longitudinally guided on the surface of the said bed.

These plates are constructed with a series of transverse notches, a, upon their forward edge, the said notches corresponding in width to the diameter of the needle-Shanks, or slightly larger, and the ends of the plates are formed with a dovetail or other convenient connection, so that one end of one plate may be readily attached to or detached from the corresponding end of the other, and they are caused to move longitudinally on the bed C by means of a worm, E, driven from the shaft B, and working in corresponding teeth on the rear edge ofthe said plates, as seen in Fig. l.

Above these plates is a reciprocating plate, F, (see Figs. l and 4,) the reciprocating motion being imparted to it by a crank, F', from the driving-shaft, as seen in Figs. l and 3, This reciprocating plate is above the bed C a distance equal to or slightly less than the diameter of the needle-shank, and the plate extends over the notches c in the plates D,as

seen in Figs. l and 4.

Directly beneath the reciprocating plate F there is a corresponding reciprocating plate, C1, (sce Fig. 2,) and which is in the same plane, or tlush with the surface ot' the bed C.V The reciprocating movement is imparted to this plate C1 by means ot' a lever, C2, its vlower end in connection with a projection, F2, from the reciprocating plate F, the upper end in connection with the plate C1, and with an intermediate stationary fulcrum, d, as seen in Figs. 3 vand 4, so that the movement of ,the plate F will impart a corresponding movement to the plate C1, but in the opposite direction; hence the needle-shanks lying between these two oppositely-reciprocating plates will be rotated back and forth, corresponding to such reciprocating movement of the plates F and C1, and at the same the traversing plates D will carry the needle-blanks along between the plates, so that they advance while they are so rotated. In front ofthe bed C there is ar ranged an adjustable guide, G, distant from the rear end of the notches in the plates D equal to the length of the needle-blanks, and so as to prevent longitudinal movement of the blanks. In front of the reciprocating plates F and C1 the grinding-cylinder L is arranged and caused to revolve rapidly by the application of power thereto in any convenient manner. This cylinder is substantially parallel with the plates F and C, and is arranged on a carriage, L2, the said carriage constructed so as to be moved transversely between suitable guides L3, and a reciprocating movement is imparted to the carriage by a crank, L1, on the driving-shaft, so as to move the cylinder toward and from the reciprocating plates F and C1, and above the cylinder there is arranged a pressure-bar, I?, made adjustable relatively to the longitudinal surface of the cylinder, but so as to move with the carriage toward and from the reciprocating plates, and so that the cylinder will pass below the needle-blanks and the pressure-bar ahove.

The needle-blanks are laid into the notchcssay, in the plate D-and the machine put in motion. These blanks will be carried between the reciprocating plates F and C1, and there receive a rotative""'llnovement, while at the same time the grinding-cylinder Will pass beneath the several blanks, commencing ,the

grinding so soon as the blanks arrive upon the cylinder, and continuing it until the blanks are carried otl' the opposite end, thereby gradually grinding the blanks until they are re the opposite end of the reciprocating plates they are removed and reset at the other end to take new blanks, the finished blanks being thereby discharged from the machine.

It will be understood that the advance of the grinding-cylinder toward the reciprocating plates is so far as to grind the blanks up to the shanks. By this construction it is only necessary to introduce the blanks at one end of the machine and they pass out completely shaped at the other end.

To facilitate the rotation ot' the blanks, it may be desirable to coat the Working-surface of the reciprocating plates with leather or other substance, which Will produce a greater friction than the metal itself.

rJhe adjustment of thedii'erent parts of the machine, for dierent sizes or grades of Work, will be readily understood by those familiar with similar machines.

i While I prefer to make the notched plates detachable one from the other, it Will be evident that these 'may be used in the form of a band, and have a continuous movement, and the same result be obtained. These detachable notched plates are applicable to carrying blanks, whether they be rotatedor not, for

Work, as for grooving, eye-punching, Snc., or to other machines in which a progressive feed is desirable.

The plates for rotating the blanks are both represented, and thus far described, as revolving, and While this is preferred, one may be stationary and the other reciprocating, and give the required rotation of the blanks.

The machine may be used for pointing the needles, and in that case the grinding-cylinder would not necessarily have the reciprocating movement described, and in that case the pressure-bar may also be dispensed With. A hopper may be applied for feeding the blanks to the notches, if desirable.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is Y l. The hereindescribed feeding device for needles and other machines, consisting of the ving-plates, and a grinding-cylinder, a pair of plates, F and C1, one or both of Which has a reciprocating movement, substantially as described.

3. rj he combination ofthe notched carrying-plates, a grinding-cylinder, a pair of plates, and G,onc or both of which has a reciprocating movement, and the adjustableguide Gr, `substantially as described. I

4. In combination With a `pair of reciprocat- ,ing plates, F and G1, and a grinding-cylinder, the traversing notched carrying-plates, and lthe adjustable pressure-bar P, substantially as described. f

Witnesses:

JOHN E. EARLE, i CLARA BaoUGH'roN.

FnANcls vv. MALLETT. 

